CN101770195B - Powder conveying device and image forming apparatus - Google Patents
Powder conveying device and image forming apparatus Download PDFInfo
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- CN101770195B CN101770195B CN2009101731501A CN200910173150A CN101770195B CN 101770195 B CN101770195 B CN 101770195B CN 2009101731501 A CN2009101731501 A CN 2009101731501A CN 200910173150 A CN200910173150 A CN 200910173150A CN 101770195 B CN101770195 B CN 101770195B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit
- G03G15/0879—Arrangements for metering and dispensing developer from a developer cartridge into the development unit for dispensing developer from a developer cartridge not directly attached to the development unit
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/08—Details of powder developing device not concerning the development directly
- G03G2215/0802—Arrangements for agitating or circulating developer material
- G03G2215/0816—Agitator type
- G03G2215/0827—Augers
- G03G2215/0833—Augers with varying pitch on one shaft
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Abstract
An aspect of the invention is a powder conveying device including a conveying passage where powder is conveyed from a first powder accommodating chamber toward a second powder accommodating chamber, in the conveying passage, a conveying member including a rotating shaft rotatable, and a blade member spirally provided around the rotating shaft and enable to convey the powder by rotation of the rotating shaft, an intake region including an intake port through which the powder is taken in from the first powder accommodating chamber, a first conveying region arranged on a downstream side of the intake region in a conveying direction of the powder, and a second conveying region arranged on a downstream side of the first conveying region in the conveying direction, a conveyable volume of the powder per one revolution of the conveying member at the second conveying region being lower than that at the first conveying region.
Description
Technical field
The present invention relates to powder conveying device and image forming apparatus.
Background technology
For example, Japanese Patent Application Laid-Open (JP-A) No.2005-24665 discloses a kind of known powder conveying device.In JP-A No.2005-24665 in disclosed powder conveying device, powder transfer unit 70Y is set in powder delivery pipe 43Y, powder transfer unit 70Y gives by the motion of powder transfer unit 70Y the displacing force that powder moves to the throughput direction downstream side, and part A is set at least a portion of powder delivery pipe 43Y, in powder delivery pipe 43Y, the powder in tube of part A by regulating power higher than the other parts in the part of powder transfer unit 70Y.
Summary of the invention
Even the purpose of one aspect of the present invention is that powder flowbility changes and also can suppresses the variation of powder operational throughput.
According to a first aspect of the invention, a kind of powder conveying device comprises: carrying path, in this carrying path, from the first powder accommodating chamber to the second powder accommodating chamber conveying powder, described powder is contained in described the first powder accommodating chamber and described the second powder accommodating chamber; Transfer unit, this transfer unit is arranged in described carrying path, and has: turning axle, this turning axle can rotate; And blade part, this blade part is helically disposed around described turning axle, and can carry described powder by the rotation of described turning axle; Entrance region, this entrance region are formed on the described carrying path that is furnished with described transfer unit, and have import, receive described powder by this import from described the first powder accommodating chamber; The first delivery area, this first delivery area is formed on the described carrying path that is furnished with described transfer unit, and is arranged in the downstream of described entrance region along the throughput direction of described powder; And second delivery area, this second delivery area is formed on the described carrying path that is furnished with described transfer unit, and be arranged in the downstream of described the first delivery area along described throughput direction, the powder volume that described transfer unit often turning in described the second delivery area can be carried often turns the powder volume that can carry lower than described transfer unit in described the first delivery area.
Powder conveying device according to a second aspect of the invention, in the structure of first aspect, the diameter of the described turning axle of described transfer unit in described the second delivery area is greater than the diameter of described turning axle in described the first delivery area of described transfer unit.
Powder conveying device according to a third aspect of the invention we, first or the structure of second aspect in, the external diameter of the described blade part of described transfer unit in described the second delivery area is less than the external diameter of described blade part in described the first delivery area of described transfer unit.
Powder conveying device according to a forth aspect of the invention, in the structure of the third aspect, the width of described carrying path in described the second delivery area is less than the width of described carrying path in described the first delivery area.
Powder conveying device according to a fifth aspect of the invention, in the structure of first aspect, in described the second delivery area, helically disposed described blade part along the axial pitch of described rotation less than blade part described in described the first delivery area along the axial pitch of described rotation.
According to a sixth aspect of the invention, a kind of image forming apparatus comprises: the described powder conveying device of either side in first aspect to the five aspects, and this powder conveying device is carried the toner as described powder; Developing apparatus, this developing apparatus has the developing room as described the second powder accommodating chamber, and described developing room receiving photographic developer, this developer comprise the described toner of being carried by described powder conveying device; And image-carrier, the described developer by described developing apparatus makes the lip-deep latent electrostatic image developing that is formed on described image-carrier.
According to a first aspect of the invention, but but the delivered volume that often turns in the first delivery area equals the structure that often turn delivered volume of transfer unit in the second delivery area and compares with transfer unit wherein, even powder flowbility changes, also can suppress the variation of powder operational throughput.
According to a second aspect of the invention, the structure that equals the diameter of turning axle in the second delivery area of transfer unit with the diameter of turning axle in the first delivery area of transfer unit is wherein compared, even powder flowbility changes, also can suppress the variation of powder operational throughput.
According to a third aspect of the invention we, the structure that equals the external diameter of blade part in the second delivery area of transfer unit with the external diameter of blade part in the first delivery area of transfer unit is wherein compared, even powder flowbility changes, also can suppress the variation of powder operational throughput.
According to a forth aspect of the invention, the structure that equals the width of carrying path in the second delivery area with the width of carrying path in the first delivery area is wherein compared, even powder flowbility changes, also can suppress the variation of powder operational throughput.
According to a fifth aspect of the invention, with wherein the second delivery area Leaf parts along the rotation axial pitch equal the first delivery area Leaf parts along the rotation axial pitch structure compare, even powder flowbility changes, also can suppress the variation of powder operational throughput.
According to a sixth aspect of the invention, but but the operational throughput that often turns in the first delivery area equals the conventional construction that often turn operational throughput of conveying blade in the second delivery area and compares with transfer unit wherein, even powder flowbility changes, also can suppress the variation of powder operational throughput.
Description of drawings
Describe illustrative embodiments of the present invention in detail with reference to following accompanying drawing, wherein:
Fig. 1 shows the schematic diagram according to the unitary construction of the image forming apparatus of exemplary embodiment of the invention;
Fig. 2 shows the schematic diagram of structure of the toner conveyance device of illustrative embodiments (embodiment 1);
Fig. 3 shows the curve map of the transformation of the distribution speed in embodiment 1;
Fig. 4 shows the schematic diagram of structure of the toner conveyance device of the modification (embodiment 2) according to illustrative embodiments;
Fig. 5 shows the curve map of the transformation of the distribution speed in embodiment 2;
Fig. 6 shows the schematic diagram according to the structure of comparative example 1 toner conveyance device;
Fig. 7 shows the curve map of the transformation of the distribution speed in comparative example 1;
Fig. 8 shows the schematic diagram according to the structure of comparative example 2 toner conveyance device;
Fig. 9 shows the curve map of the transformation of the distribution speed in comparative example 2;
Figure 10 shows the schematic diagram according to the structure of comparative example 3 toner conveyance device;
Figure 11 shows the curve map of the transformation of the distribution speed in comparative example 3; And
Figure 12 is the schematic diagram according to the structure of the toner conveyance device of the modification of illustrative embodiments.
Embodiment
Hereinafter with reference to accompanying drawing, illustrative embodiments of the present invention is described.
(according to the unitary construction of the image forming apparatus of illustrative embodiments)
With the unitary construction of describing according to the image forming apparatus of exemplary embodiment of the invention.Fig. 1 shows the schematic diagram according to the unitary construction of the image forming apparatus of this illustrative embodiments.
Image forming apparatus 10 comprises recording medium accomodating unit 12, image forming portion 14, delivery unit 16, fixing device 18 and recording medium deliverying unit 20.Recording medium P such as sheet material is contained in recording medium accomodating unit 12.Image forming portion 14 forms toner image on recording medium P.Delivery unit 16 is transferred to image forming portion 14 with recording medium P from recording medium accomodating unit 12.The toner image that fixing device 18 will form by image forming portion 14 is to recording medium P.Photographic fixing has the recording medium P of toner image to 20 discharges of recording medium deliverying unit by fixing device 18.
Image forming portion 14 comprises image formation unit 22Y, 22M, 22C and 22K, intermediate transfer belt 24, primary transfer roller 26 and secondary transfer roller 28.Image formation unit 22Y, 22M, 22C and 22K form respectively the toner image of yellow (Y), magenta (M), cyan (C) and black (K).The toner image that is formed by image formation unit 22Y, 22M, 22C and 22K is transferred to intermediate transfer belt 24, and intermediate transfer belt 24 is embodiment of intermediate transfer element.Primary transfer roller 26 as the embodiment of primary transfer parts is transferred to intermediate transfer belt 24 with the toner image that image formation unit 22Y, 22M, 22C and 22K form.The toner image that will be transferred to intermediate transfer belt 24 as the secondary transfer roller 28 of the embodiment of secondary transfer printing parts is transferred to recording medium P.
Image formation unit 22Y, 22M, 22C and 22K include along the photosensitive drums 30 of a direction (counter clockwise direction in Fig. 1) rotation.Photosensitive drums 30 is that it forms the image-carrier of electrostatic latent image in the surface.
Charging device 32, exposure device 34, developing apparatus 36, erasing apparatus 38 and toner removal device 40 are set in sequence in each photosensitive drums 30 along the sense of rotation of photosensitive drums 30 from upstream side with this around.Charging device 32 makes photosensitive drums 30 surface chargings.Exposure device 34 is the face exposure of charged photosensitive drums 30, to form electrostatic latent image in photosensitive drums 30 surfaces.The latent electrostatic image developing that forms in the surface of developing apparatus 36 with photosensitive drums 30 forms toner image thus.After toner image was transferred to intermediate transfer belt 24, erasing apparatus 38 was wiped electric charge from photosensitive drums 30 surfaces.After toner image was transferred to intermediate transfer belt 24, toner removal device 40 was removed the photosensitive drums 30 upper remaining toners in surface.
Developing apparatus 36 comprises developing room 36A, and the developer container that comprises toner and magnetic carrier is contained in developing room 36A, and developing room 36A is the embodiment that accommodates the second powder chamber of powder.Transfer unit 36B and developer roll 36C are set in developing room 36A.Transfer unit 36B supplying developing agent when stirring developer.Keep the developer carried by transfer unit 36B as the developer roll 36C of the embodiment of developer holding member.The toner that is kept by developer roll 36C adheres to photosensitive drums 30 surfaces, with latent electrostatic image developing.
The toner conveyance device 60 of this illustrative embodiments can be for delivery of the situation of the powder except toner.For example, toner conveyance device 60 can be used for the powder except toner, and the mobility of this powder changes along with the variation of environmental baseline or working condition.
Intermediate transfer belt 24 is wound around around opposed roll 42, driven roller 44 and backing roll 46.Opposed roll 42 is towards secondary transfer roller 28.Intermediate transfer belt 24 the contact photosensitive drums 30 in along a direction (clockwise direction in Fig. 1) loopy moving.
Toner is removed unit 48 and is arranged on intermediate transfer belt 24, is with remaining toner on 24 to quote in the middle of removing.
Primary transfer roller 26 is towards photosensitive drums 30, thereby clamps intermediate transfer belt 24 together with photosensitive drums 30.Formation primary transfer position between primary transfer roller 26 and photosensitive drums 30.Toner image on photosensitive drums 30 in the primary transfer position by primary transfer to intermediate transfer belt 24.In the primary transfer position, primary transfer roller 26 is transferred to intermediate transfer belt 24 by pressure and electrostatic force with the lip-deep toner image of photosensitive drums 30.
Secondary transfer roller 28 is towards opposed roll 42, thereby clamps intermediate transfer belt 24 together with opposed roll 42.Formation secondary transfer printing position between secondary transfer roller 28 and opposed roll 42.Toner image on intermediate transfer belt 24 in the secondary transfer printing position by secondary transfer printing to recording medium P.
Delivery unit 16 comprises outlet roller 50 and the paired roller 52 that transports.Outlet roller 50 is sent the recording medium P that is contained in recording medium accomodating unit 12.Paired transport recording medium P that roller 52 sends outlet roller 50 and be transported to the secondary transfer printing position, simultaneously recording medium P is clipped in therebetween.
Fixing device 18 is arranged in the downstream of secondary transfer printing position along carriage direction, be used for making the toner image that is transferred to recording medium P in the secondary transfer printing position.
A pair ofly transport roller 54 and a pair of distributing roller 56 is arranged sequentially in the downstream of fixing device 18 along carriage direction with this.Should transport recording medium P when being clipped in recording medium P therebetween to transporting roller 54.This is discharged to recording medium deliverying unit 20 to distributing roller 56 with recording medium P.
Below will be described in the image that forms image in the image processing system of illustrative embodiments and form operation.
In the image processing system 10 of illustrative embodiments, when forming image on recording medium P, this will be transported to from the recording medium P that recording medium accomodating unit 12 is sent the secondary transfer printing position to transporting roller 52.
On the other hand, in intermediate transfer belt 24, overlapping to form coloured image by the toner image that image formation unit 22Y, 22M, 22C and 22K form.The coloured image that forms on intermediate transfer belt 24 is transferred to the recording medium P that is transported to the secondary transfer printing position.
Transfer printing has the recording medium P of toner image to be transported to fixing device 18, and by the toner image of fixing device 18 with institute's transfer printing.This has the recording medium P of toner image to be discharged to recording medium deliverying unit 20 photographic fixing to distributing roller 56.In this way, carry out a series of image and form operation.
(according to the structure of the toner conveyance device of illustrative embodiments)
Below the structure of the toner conveyance device of illustrative embodiments will be described.Fig. 2 shows the schematic diagram of structure of the toner conveyance device of this illustrative embodiments.
The toner conveyance device 60 of this illustrative embodiments comprises carrying path 62 and transfer unit 64.Toner is transported to developing room 36A from toner accommodating chamber 58 by carrying path 62.Transfer unit 64 is arranged in carrying path 62, for delivery of toner.
An end (right-hand member in Fig. 2) at turning axle 64A arranges gear parts 66.Gear parts 68 engagements on gear parts 66 and the driving shaft 70 that is arranged on the drive part (not shown).Therefore, driving shaft 70 rotates by the driving force of drive part, and the torque of driving shaft 70 is transferred to turning axle 64A by gear parts 68 and 66.Transmission has the turning axle 64A rotation of the torque of driving shaft 70, to transmit toner by blade part 64B.
Crank 76 is connected to the other end of turning axle 64A, is used for converting rotatablely moving of turning axle 64A to to-and-fro movement.One end of spiral winding coil 78 is connected to crank 76.Therefore, crank 76 converts rotatablely moving of turning axle 64A to to-and-fro movement, so that coil 78 moves up and down.
In delivery pipe 72, form the entrance region T with import 80 on the carrying path 62 that is furnished with transfer unit 64.Toner is received delivery pipe 72 by import 80 from toner accommodating chamber 58.Import 80 is formed on 58 belows, toner accommodating chamber and is positioned at the top of delivery pipe 72.The toner that falls from toner accommodating chamber 58 is received in carrying path 62 delivery pipe 72 by import 80.
In entrance region T, transfer unit 64 will be transported to the downstream by the toner that import 80 receives.The scope of entrance region T is from the end (part of double dot dash line 80A) of import 80 to the other end (part of double dot dash line 80B).
In delivery pipe 72, form the first delivery area H1 on the carrying path 62 that is furnished with transfer unit 64.The first delivery area H1 is arranged in the downstream of entrance region T along throughput direction.In the first delivery area H1, transfer unit 64 will be transported to the downstream from the toner that entrance region T carries.
In delivery pipe 72, form the second delivery area H2 on the carrying path 62 that is furnished with transfer unit 64.The second delivery area H2 is arranged in the downstream of the first delivery area H1 along throughput direction.In the second delivery area H1, transfer unit 64 will be transported to the downstream from the toner that the first delivery area H1 carries.
In the second delivery area H2, but but the operational throughput that often turns of transfer unit 64 often turns operational throughput lower than transfer unit expense 4 in the first delivery area H1.Specifically, in the second delivery area H2, the diameter (shaft diameter) of the turning axle 64A of transfer unit 64 is greater than the diameter of turning axle 64A in the first delivery area H1.
For example, in the situation that in entrance region T and the first delivery area H1, the diameter of turning axle 64A is 3mm, in the second delivery area H2, the diameter range of turning axle 64A is to be equal to or greater than 8mm and to be equal to or less than 9mm.
In this case, the external diameter of blade part 64B is set to 12mm, and the internal diameter of delivery pipe 72 (duct width of carrying path 62) is set to 14mm, and the pitch of blade part 64B is set to 14mm.What note is, should " pitch " expression from the summit of blade part 64B to the distance on another summit of blade part 64B, another summit of a rear blade part 64B is axially adjacent with a described summit along turning axle 64A's.
For example, the length range of the second delivery area H2 is two pitches (1 to 2 pitch) that a pitch being equal to or greater than blade part 64B is equal to or less than blade part 64B, the length range of the first delivery area H1 is one and half pitches (0.5 to 1.5 pitch) that the half pitch that is equal to or greater than blade part 64B is equal to or less than blade part 64B, and the length of entrance region T is one and half pitches (1.5 pitches) of blade part 64B.
In the accompanying drawings, alphabetical A represents the diameter of turning axle 64A, and letter b represents the external diameter of blade part 64B, and letter C represents the internal diameter of delivery pipe 72.
In the second delivery area H2, but but the operational throughput that often turns of transfer unit 64 is not limited to following structure lower than the structure that often turns operational throughput of transfer unit 64 in the first delivery area H1: the diameter of the turning axle 64A of transfer unit 64 in the second delivery area H2 is greater than the diameter of turning axle 64A in the first delivery area H1 of transfer unit 64.For example, as shown in Figure 4, in the second delivery area H2, the external diameter of the blade part 64B of transfer unit 64 can be less than the external diameter of blade part 64B in the first delivery area H1 of transfer unit 64, and the internal diameter of delivery pipe 72 (duct width of carrying path 62) is less than the internal diameter of delivery pipe 72 in the first delivery area H1.
In this case, in external diameter as the blade part 64B of transfer unit 64 in the first delivery area H1 and the second delivery area H2 not simultaneously, aspect the internal diameter (duct width of carrying path 62) of delivery pipe 72, the first delivery area H1 can equal the second delivery area H2.
In the second delivery area H2, but but the operational throughput that often turns of transfer unit 64 can be following structure lower than the structure that often turns operational throughput of transfer unit 64 in the first delivery area H1: the diameter of the turning axle 64A of transfer unit 64 in the second delivery area H2 is greater than the diameter of turning axle 64A in the first delivery area H1 of transfer unit 64, and the external diameter of the blade part 64B of transfer unit 64 in the second delivery area H2 is less than the external diameter of blade part 64B in the first delivery area H1 of transfer unit 64.
In the second delivery area H2, but but the operational throughput that often turns of transfer unit 64 can be following structure lower than the structure that often turns operational throughput of transfer unit 64 in the first delivery area H1: the pitch of the blade part 64B of transfer unit 64 in the second delivery area H2 is less than the pitch (" 1 pitch (H2) " less than " 1 pitch (H1) ", referring to Figure 12) of blade part 64B in the first delivery area H1 of transfer unit 64.
it should be noted, but but as wherein in the second delivery area H2 transfer unit 64 often turn operational throughput lower than the structure that often turns operational throughput of transfer unit 64 in the first delivery area H1, can make up above-mentioned following any configuration: " diameter of the turning axle 64A of transfer unit 64 in the second delivery area H2 is greater than the diameter of turning axle 64A in the first delivery area H1 of transfer unit 64 ", " external diameter of the blade part 64B of transfer unit 64 in the second delivery area H2 is less than the external diameter of blade part 64B in the first delivery area H1 of transfer unit 64 ", " internal diameter (duct width of carrying path 62) of delivery pipe 72 in the second delivery area H2 is less than the internal diameter of delivery pipe 72 in the first delivery area H1 " and " pitch of the blade part 64B of transfer unit 64 in the second delivery area H2 is less than the pitch of blade part 64B in the first delivery area H1 of transfer unit 64 ".
(evaluation)
Below will describe embodiment 1 and 2 and comparative example's 1 to 3 evaluation of carrying out.In evaluation procedure, in the structure of illustrative embodiments, the pitch of blade part 64B is set to 14mm, the length of entrance region T is set to one and half pitches of blade part 64B, the first length that transmits district H1 is set to one and half pitches of blade part 64B, and the length of the second delivery area H2 is set to two pitches of blade part 64B.
Embodiment 1 and 2 and comparative example 1 to 3 in when all being provided with the internal diameter of the external diameter of diameter, blade part 64B of turning axle 64A and delivery pipe 72, carry out and estimate.
Evaluation is carried out by following steps: be maintained at the toner that is applied in thermal stress in hot environment and the toner that is not applied in thermal stress by use, calculate the amount (distribution speed) of the toner of a toner Cartridge time per unit conveying.
＜embodiment 1 〉
For embodiment 1, in entrance region T, the first delivery area H1 and the second delivery area H2, the internal diameter of delivery pipe 72 is set to 14mm, and the external diameter of blade part 64B is set to 12mm.In entrance region T and the first delivery area H1, the diameter of turning axle 64A is set to 3mm.In the second delivery area H2, the diameter of turning axle 64A is set to 9mm (referring to Fig. 2).
As the evaluation result of embodiment 1, be applied in the toner of thermal stress and the distribution speed difference that is not applied between the toner of thermal stress is 3%, as shown in Figure 3.
Although distribute the absolute value reduction of speed, pass through the external diameter that increase as required is used for the rotating speed of rotation and driving turning axle 64A or passes through the blade part 64B of increase transfer unit 64, can increase the absolute value that distributes speed.
＜embodiment 2 〉
For embodiment 2, in entrance region T, the first delivery area H1 and the second delivery area H2, the diameter of turning axle 64A is set to 3mm.In entrance region T and the first delivery area H1, the internal diameter of delivery pipe 72 is set to 14mm, and the external diameter of blade part 64B is set to 12mm.In the second delivery area H2, the internal diameter of delivery pipe 72 is set to 9.5mm, and the external diameter of blade part 64B is set to 8.5mm (referring to Fig. 4).As the evaluation result of embodiment 2, be applied in the toner of thermal stress and the distribution speed difference that is not applied between the toner of thermal stress is 7%, as shown in Figure 5.
＜comparative example 1 〉
For comparative example 1, in entrance region T, the first delivery area H1 and the second delivery area H2, the internal diameter of delivery pipe 72 is set to 14mm, and the external diameter of blade part 64B is set to 12mm, and the diameter of turning axle 64A is set to 3mm (referring to Fig. 6).
The evaluation result of embodiment 1 as a comparison is applied in the toner of thermal stress and the distribution speed difference that is not applied between the toner of thermal stress is 25%, as shown in Figure 7.
＜comparative example 2 〉
For comparative example 2, in entrance region T, the first delivery area H1 and the second delivery area H2, the internal diameter of delivery pipe 72 is set to 14mm, and the external diameter of blade part 64B is set to 12mm, and the diameter of turning axle 64A is set to 9mm (referring to Fig. 8).
The evaluation result of embodiment 2 as a comparison is applied in the toner of thermal stress and the distribution speed difference that is not applied between the toner of thermal stress is 33%, as shown in Figure 9.
＜comparative example 3 〉
For comparative example 3, in entrance region T, the first delivery area H1 and the second delivery area H2, the external diameter that the internal diameter of delivery pipe 72 is set to 14mm and blade part 64B is set to 12mm.
In entrance region T, the diameter of turning axle 64A is set to 3mm.In the first delivery area H1 and the second delivery area H2, the diameter of turning axle 64A is set to 9mm (referring to Figure 10).
The evaluation result of embodiment 2 as a comparison is applied in the toner of thermal stress and the distribution speed difference that is not applied between the toner of thermal stress is 27%, as shown in Figure 11.
In comparative example 1 to 3, be applied in the toner of thermal stress and the distribution speed difference that is not applied between the toner of thermal stress is 25%, 33% and 27%.On the other hand, in embodiment 1 and 2, distribute speed difference to be modified to 3% and 7%.
In comparative example 3, although but but the operational throughput that often turns that often turns operational throughput and transfer unit 64 in the first delivery area H1 and the second delivery area H2 of transfer unit 64 exists differently in entrance region T, also realize improving.That is, but but it should be understood that make transfer unit 64 in the first delivery area H1 often turn operational throughput and transfer unit 64 often turning in the second delivery area H2 exist between operational throughput different very important, as the same in embodiment 1 and embodiment 2.
This be because: although receive the amount of the toner between the blade part 64B of transfer unit 64 because the toner difference of flowability changes from toner accommodating chamber 58 in entrance region T, but by setting gradually " but the large part of toner operational throughput " and " but the little part of toner operational throughput " in the toner delivery area after entrance region T and then, absorb the variation that produces in entrance region T, therefore stablized the toner operational throughput.
The invention is not restricted to above-mentioned illustrative embodiments, but without departing from the present invention, can carry out various modifications, changes and improvements.
Claims (5)
1. image forming apparatus, this image forming apparatus comprises:
Powder conveying device, this powder conveying device is carried the toner as powder;
Developing apparatus, this developing apparatus makes latent electrostatic image developing, and has developing room (36A), and described developing room receiving photographic developer, this developer comprise the described toner of being carried by described powder conveying device; And
Image-carrier, the described developer by described developing apparatus makes the lip-deep described latent electrostatic image developing that is formed on described image-carrier,
Wherein, be provided with in described developing room (36A):
Developing room transfer unit (36B), this developing room transfer unit (36B) supplying developing agent, and
Developer holding member (36C), this developer holding member (36C) keeps the developer by described developing room transfer unit (36B) conveying, the toner that is kept by described developer holding member (36C) adheres to the surface of described image-carrier, with described latent electrostatic image developing, and
Described powder conveying device comprises:
Be formed on the carrying path (62) in delivery pipe (72), in this carrying path (62), described toner is carried to described developing room (36A) from the toner accommodating chamber (58) that holds described toner;
Transfer unit (64), this transfer unit (64) is arranged in described delivery pipe (72), and has: turning axle, this turning axle can rotate; And blade part, this blade part is helically disposed around described turning axle, and can carry described toner by the rotation of described turning axle;
Entrance region, this entrance region are formed in the described delivery pipe (72) that is furnished with described transfer unit, and have import, receive described toner by this import from described toner accommodating chamber (58);
The first delivery area, this first delivery area are formed in the described delivery pipe (72) that is furnished with described transfer unit, and are arranged in the downstream of described entrance region along the throughput direction of described toner; And
The second delivery area, this second delivery area is formed in the described delivery pipe (72) that is furnished with described transfer unit, and be arranged in the downstream of described the first delivery area along described throughput direction, the powder volume that described transfer unit often turning in described the second delivery area can be carried often turns the powder volume that can carry lower than described transfer unit in described the first delivery area.
2. image forming apparatus according to claim 1, wherein, the diameter of the described turning axle of described transfer unit in described the second delivery area is greater than the diameter of described turning axle in described the first delivery area of described transfer unit.
3. image forming apparatus according to claim 1 and 2, wherein, the external diameter of the described blade part of described transfer unit in described the second delivery area is less than the external diameter of described blade part in described the first delivery area of described transfer unit.
4. image forming apparatus according to claim 3, wherein, the width of described carrying path in described the second delivery area is less than the width of described carrying path in described the first delivery area.
5. image forming apparatus according to claim 1, wherein, in described the second delivery area, helically disposed described blade part along the axial pitch of described rotation less than blade part described in described the first delivery area along the axial pitch of described rotation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009000143A JP2010156910A (en) | 2009-01-05 | 2009-01-05 | Powder conveying device and image forming apparatus |
| JP2009-000143 | 2009-01-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101770195A CN101770195A (en) | 2010-07-07 |
| CN101770195B true CN101770195B (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101731501A Active CN101770195B (en) | 2009-01-05 | 2009-09-11 | Powder conveying device and image forming apparatus |
Country Status (3)
| Country | Link |
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| US (1) | US8290406B2 (en) |
| JP (1) | JP2010156910A (en) |
| CN (1) | CN101770195B (en) |
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| JP5540613B2 (en) * | 2009-09-08 | 2014-07-02 | 富士ゼロックス株式会社 | Image forming apparatus and toner container |
| JP4951662B2 (en) * | 2009-10-06 | 2012-06-13 | シャープ株式会社 | Toner cartridge, image forming apparatus, and image forming method |
| JP5521476B2 (en) * | 2009-10-07 | 2014-06-11 | 富士ゼロックス株式会社 | Image forming apparatus and toner container |
| JP5397389B2 (en) | 2011-01-21 | 2014-01-22 | コニカミノルタ株式会社 | Toner supply device and image forming apparatus having the same |
| JP5548656B2 (en) * | 2011-07-14 | 2014-07-16 | 京セラドキュメントソリューションズ株式会社 | Toner supply device and image forming apparatus |
| JP2013195855A (en) * | 2012-03-21 | 2013-09-30 | Casio Electronics Co Ltd | Waste toner conveying unit |
| JP5978694B2 (en) * | 2012-03-23 | 2016-08-24 | 富士ゼロックス株式会社 | Powder conveying device |
| JP6024540B2 (en) * | 2013-03-15 | 2016-11-16 | 株式会社リコー | Developer transport device and image forming apparatus |
| US9116499B1 (en) * | 2014-06-16 | 2015-08-25 | Xerox Corporation | Enhanced toner throughput agitator configuration for a customer replaceable unit |
| JP6314818B2 (en) * | 2014-12-19 | 2018-04-25 | 京セラドキュメントソリューションズ株式会社 | Toner container and image forming apparatus to which toner container is attached |
| JP6500456B2 (en) * | 2015-01-28 | 2019-04-17 | 富士ゼロックス株式会社 | Image forming device |
| JP6624448B2 (en) * | 2016-03-08 | 2019-12-25 | 株式会社リコー | Toner conveying device and image forming device |
| CN109266365B (en) * | 2018-09-05 | 2021-12-31 | 任慷平 | Component separation type carbonization system |
| JP7115178B2 (en) * | 2018-09-20 | 2022-08-09 | 富士フイルムビジネスイノベーション株式会社 | CONVEYING MECHANISM, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS |
| US11300901B2 (en) * | 2019-11-15 | 2022-04-12 | Canon Kabushiki Kaisha | Toner conveying apparatus having orthogonal toner conveying paths and image forming apparatus |
| EP4141559A4 (en) * | 2020-04-22 | 2024-04-17 | Kyocera Document Solutions Inc | Toner conveyance device, and developing device and image forming device provided with toner conveyance device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2010156910A (en) | 2010-07-15 |
| US8290406B2 (en) | 2012-10-16 |
| CN101770195A (en) | 2010-07-07 |
| US20100172674A1 (en) | 2010-07-08 |
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